Bump net-imap in the bundler group across 1 directory

Bumps the bundler group with 1 update in the / directory: [net-imap](https://github.com/ruby/net-imap).


Updates `net-imap` from 0.5.1 to 0.5.6
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.5.1...v0.5.6)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-type: indirect
  dependency-group: bundler
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -103,7 +103,7 @@ GEM
     concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
-    date (3.4.0)
+    date (3.4.1)
     drb (2.2.1)
     erubi (1.13.0)
     globalid (1.2.1)
@@ -130,7 +130,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.22.2)
     mutex_m (0.3.0)
-    net-imap (0.5.1)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)
@@ -247,7 +247,7 @@ GEM
       thor (>= 1.2.0)
       yard-sorbet
     thor (1.3.1)
-    timeout (0.4.2)
+    timeout (0.4.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)